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In a survey, it is found that 105 people...

In a survey, it is found that 105 people take X brand pan-masala, 130 take Y brand pan-masala and 145 take Z brand pan-masala. If 70 people take X brand as well as Y brand, 75 take Y brand as well as Z brand, 60 take X brand as well as Z brand and 40 take all the three. Find how many take Z brand pan-masala only?

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